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From "Suresh Srinivas (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-9343) Allow additional exceptions through the RPC layer
Date Fri, 01 Mar 2013 22:39:15 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-9343?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13591033#comment-13591033
] 

Suresh Srinivas commented on HADOOP-9343:
-----------------------------------------

+1 for the patch.

As regards to returning error codes, the RPC layer currently returns:
- Reply status - (success, error, fatal)
- exception name - which could be treated as an error name or translated to error ID
- exception stack trace - details related to error

Implementation that have awareness of exception could use the above information. If not, it
can be translated to suitable error code returns, right?
                
> Allow additional exceptions through the RPC layer
> -------------------------------------------------
>
>                 Key: HADOOP-9343
>                 URL: https://issues.apache.org/jira/browse/HADOOP-9343
>             Project: Hadoop Common
>          Issue Type: Improvement
>    Affects Versions: 2.0.3-alpha
>            Reporter: Siddharth Seth
>            Assignee: Siddharth Seth
>         Attachments: HADOOP-9343_2.txt, HADOOP-9343.txt
>
>
> The RPC layer currently only allows IOException, RuntimeException, InterruptedException
and their derivatives - which limits exceptions declared by protocols.
> Other exceptions end up at the client as an UndeclaredThrowableException wrapped in RemoteException.
> Additional exception types should be allowed.

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